Brace for concrete structures.



- PATENTED EBB. 25, 1908.

A. J. ROBINSON. BRAGE FOR GONORETE STRUCTURES.

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APPLICATION FILED JUNE 27,1907.

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' PATENTED FEB. 25, .1908.

A. J. ROBINSON. BRAGE FOR CONCRETE STRUCTURES.

APPLICATION FILED JUNE 27,1907.

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BRAGE FOR CONCRETE STRUCTURES.

Specification of Letters Patent.

Patented Feb. 25, 1908.

Application filed June 2'7. 1907- Serial No. 381.097.

To all whom it may concern:

Be it known that I, ALBERT J. ROBINSON, citizen of the United States,residing at 17 83 Johnson street, northwest, Washington, District ofColumbia, have invented certain new and useful Improvements in Bracesfor Concrete Structures, of which the following is a specification.

This invention relates to braces, and more particularly to those for usein concrete structures, and has for its object to provide a brace ofthis kind adapted to be employed with I-beams of the usual type, tosupport the concrete therebetween, another object being to provide asimple and efiicient brace system of the kind which may be readilyinstalled at a relatively low cost.

Other objects and advantages will be apparent from the followingdescription and it will be understood that changes in the specificstructure shown and described may be made within the scope of the claimswithout departing from the spirit of the invention.

In the drawings forming a portion of this specification and in whichlike numerals of reference indicate similar parts in the several views,Figure 1 is a transverse section of a concrete floor, the present bracebeing shown in elevation, Fig. 2 is a horizontal section on line 22 ofFig. 1, showing the bridge mem bers in top plan, Fig. 3 is a detail viewshowing a modified form of the invention. Fig. 4 is a top plan view oftwo beams showing the cross braces and their connecting bridge pieces.

Referring now to the drawings, there are shown a pair of Ibeams 5 and 6including the usual webs 7 and top and bottom flanges 8 and 8respectively. Cross braces 9 are located between the I-beams, restingupon the base flanges 8, and at their extremities against the webs 7.These braces each include a straight bottom member 10 and an upperupwardly curved member 11, secured at its ends to the ends of the bottommember and the two members are connected by a plurality of verticallyextending rods 12 having oppositely disposed lateral projections 13between their ends, which extend longitudi nally of the brace.

The lateral projections 13 act as supports for the ends of bridge plates14, which extend between the braces, these bridge plates havingbifurcated ends and resultant space portions 15, as shown, which lie atopposite sides of the rods 12 and rest upon the projections 13. Thebridge plates thus act to support the weight of concrete between thebraces.

From the foregoing it will be seen that the structure is such as tosupport a relatively great weight of concrete, as there is provided whatis in effect a truss structure, the tendency of the braces 9 to sagunder such weight being offset by the pressure of the ends of the member11 against the I-beams.

In Fig. 3 there is shown a brace including a bottom member 10, andupwardly curved member 11 connected by vertical members A. Above each ofthese vertical members, a projection B extends upwardly beyond the upermember 11, these projections carrying ateral fingers C, corresponding tothe projections 13, and these fingers receive a bridge piece thereuponto support the latter. The weight of the bridge piece and concrete supported thereby is thus disposed upon the upper member 11, as will bereadily understood.

It will be understood that the present structure may be embodied inbraces of different kinds from the specific forms shown in the drawings.

WVhat is claimed is:

1. The combination with spaced beams of braces between the beams, saidbraces incl'uding upper and lower members and connecting u rights, andbridge plates having bifurcate ends disposed with the uprights in theirbifurcations, said bridge plates ex tending between the braces.

2. The combination with spaced beams, of

braces located between the beams, said braces including verticalportions having lateral projections, and bridge plates having bifurcatedends and resultant spaced portions disposed between the braces with thevertical portions thereof in their bifurcations and with their spacedportions upon the projections. In testimony whereof I affix my signaturein presence of two witnesses.

ALBERT J. ROBINSON. Witnesses:

WILLIAM G. GENTNER, EDWARD DOUGHERTY.

